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A gene on chromosome 6p21.3 that encodes a receptor tyrosine kinase belonging to the subfamily homologous to Dictyostelium discoideum protein discoidin (Discoidin Domain-containing Receptor); it is expressed only in epithelial cells (kidney, lung, GI tract, brain) and involved in cell–cell interactions and recognition.

Molecular pathology
DDR1 is overexpressed in various tumours.


Abbrev. for Diploma in Diagnostic Radiology.
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The product, just an inch thick, is operable in landscape or portrait mode and includes a USB keyboard module, an optional external USB optical drive, a 30GB hard drive and 128MB of DDR RAM memory that is upgradeable to 512MB.
The new 12-inch PowerBook G4 has a 867 MHz PowerPC G4 processor with Velocity Engine and offers 256MB of fast Double Data Rate (DDR) memory (expandable to 640MB) and a fast NVIDIA GeForce4 420 Go graphics processor with 32MB of dedicated DDR RAM for incredible 3D graphics and display performance.
Desktop PCs use fast DDR RAM memory and this is now common on notebooks, too.
25GHz processor with 512KB on-chip level 2 cache, an ATI Mobility Radeon 9600 graphics card, 64MB DDR RAM and a 60GB or 80GB Ultra ATA/100 hard drive.
has announced that its MOBILITY RADEON 7500 graphics processor with 64 MB DDR RAM has been selected by WinBook Corporation for the new WinBook J4 notebook PC.
Finally, the Portege R100 weighs just over 1kg with an Intel Pentium 900MHz processor M with 1MB cache, a Trident Xp graphics processor, 256MB DDR RAM, up to 40GB hard drive and a 12.
0GHz, up to 512MB DDR RAM, integrated 56K modem, a 20GB, 30GB or 40GB hard drive, a PC Card slot and a 12-cell 94 Watt Hour Lithium Ion battery.
The graphics processor has 64MB of it's own DDR RAM and is perfect for powerful applications like photo and video editing.